Pamban To Become India’s First Railway Bridge To Use Stainless Steel Structure
Compared to carbon steel, duplex stainless steel is an optimum techno-commercial solution to avoid corrosion in this engineering marvel. SS 2205 duplex grade of stainless steel has an excellent combination of strength, toughness and corrosion resistance. Given the inherently high strength-to-weight ratio of duplex stainless steel, it provides the possibility of reducing the thickness of the components, thereby entailing a lighter structure. With lesser weight of the structure, the consumption of concrete will also see a significant reduction. Along with high resistance to pitting and crevice corrosion, even in the most corrosive environment, duplex stainless steel provides excellent impact and fire resistance.
On account of its extremely high corrosion resistance, duplex stainless steel can be used in unpainted condition, requiring minimal maintenance. This results in saving heavy recurring maintenance costs. Moreover, usage of duplex stainless steel will improve the structural life of the bridge by 3 to 4 times, as compared to the currently used carbon steel. Thus, overall, usage of duplex stainless steel provides the least life cycle cost as compared to any other alternative material.
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